New Delhi, June 29 -- A dramatic moment during Beyonce's Cowboy Carter Tour concert in Houston on Saturday night sent waves of concern through the packed NRG Stadium, as a mid-performance stunt malfunctioned midair.

The global superstar was performing '16 Carriages' while seated in a suspended, velvet-wrapped red Cadillac when the vehicle began to tilt dangerously as it hovered above the crowd.

Fan-captured footage of the incident shows the car slowly tipping sideways as it turned over one section of the stadium. Mid-song, Beyonce is heard calling out, "Stop, stop, stop," as the vehicle's instability became apparent. The stunt, intended to give fans an intimate, overhead view while a montage of her career played on the big screen, had b...